Magnetic Head and Magnetic Recording Device

Abstract

The present invention provides a magnetic head and a magnetic recording device capable of improving the recording density. According to an embodiment, the magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, and a magnetic member. The magnetic element is disposed between the first magnetic pole and the second magnetic pole and includes a first magnetic layer. The magnetic member includes a first magnetic portion. A second direction from the first magnetic portion to the magnetic element intersects a first direction from the first magnetic pole to the second magnetic pole. The first magnetic portion includes a magnetic material. The magnetic material includes at least any one of a first material, a second material, and a third material. The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga. The second material includes at least one selected from the group consisting of a cubic or tetragonal compound containing Mn and Ni, a cubic alloy of Mn containing a γ phase, and a cubic alloy of Fe. The third material includes an antiferromagnet.

Description

[0001] This application is based on Japanese Patent Application No. 2021-097133 (filing date: June 10, 2021), and claims priority therefrom. This application incorporates all the contents of that application by reference thereto. Technical Field

[0002] Embodiments of the present invention relate to a magnetic head and a magnetic recording device. Background Art

[0003] A magnetic head is used to record information on a magnetic recording medium such as an HDD (Hard Disk Drive). In magnetic heads and magnetic recording devices, it is desired to increase the recording density. Summary of the Invention

[0004] Embodiments of the present invention provide a magnetic head and a magnetic recording device capable of increasing the recording density.

[0005] Means for Solving the Problem

[0006] According to an embodiment of the present invention, a magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, and a magnetic member. The magnetic element is disposed between the first magnetic pole and the second magnetic pole and includes a first magnetic layer. The magnetic member includes a first magnetic portion. A second direction from the first magnetic portion to the magnetic element intersects a first direction from the first magnetic pole to the second magnetic pole. The first magnetic portion includes a magnetic material. The magnetic material includes at least any one of a first material, a second material, and a third material. The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga. The second material includes at least one selected from the group consisting of a cubic or tetragonal compound including Mn and Ni, a cubic alloy including γ-phase Mn, and a cubic alloy including Fe. The third material includes an antiferromagnet.

[0007] According to the magnetic head configured as described above, it is possible to provide a magnetic head and a magnetic recording device capable of increasing the recording density. Brief Description of the Drawings

[0008] Figure 1 (a) and Figure 1 (b) are schematic views illustrating the magnetic head of the first embodiment.

[0009] Figure 2 is a schematic perspective view illustrating the magnetic head of the first embodiment.

[0010] Figure 3 is a schematic cross-sectional view illustrating the magnetic recording device of the first embodiment.

[0011] Figure 4 (a) andFigure 4 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0012] Figure 5 (a) and Figure 5 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0013] Figure 6 (a) and Figure 6 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0014] Figure 7 (a) and Figure 7 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0015] Figure 8 (a) and Figure 8 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0016] Figure 9 (a) and Figure 9 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0017] Figure 10 (a) and Figure 10 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0018] Figure 11 (a) and Figure 11 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0019] Figure 12 (a) and Figure 12 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0020] Figure 13 (a) and Figure 13 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0021] Figure 14 (a) and Figure 14 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0022] Figure 15 (a) and Figure 15 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0023] Figure 16 (a) and Figure 16 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0024] Figure 17 (a) andFigure 17 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0025] Figure 18 (a) and Figure 18 (b) are schematic diagrams illustrating the magnetic head of the first embodiment.

[0026] Figure 19 (a) and Figure 19 (b) are schematic diagrams illustrating the magnetic head of the first embodiment.

[0027] Figure 20 (a) and Figure 20 (b) are schematic diagrams illustrating the magnetic head of the first embodiment.

[0028] Figure 21 (a) and Figure 21 (b) are schematic diagrams illustrating the magnetic head of the first embodiment.

[0029] Figure 22 (a) and Figure 22 (b) are schematic diagrams illustrating the magnetic head of the first embodiment.

[0030] Figure 23 is a schematic cross-sectional view illustrating the magnetic head of the first embodiment.

[0031] Figure 24 is a schematic cross-sectional view illustrating the magnetic head of the embodiment.

[0032] Figure 25 is a schematic perspective view illustrating the magnetic recording apparatus of the embodiment.

[0033] Figure 26 is a schematic perspective view illustrating a part of the magnetic recording apparatus of the embodiment.

[0034] Figure 27 is a schematic perspective view illustrating the magnetic recording apparatus of the embodiment.

[0035] Figure 28 (a) and Figure 28 (b) are schematic perspective views illustrating a part of the magnetic recording apparatus of the embodiment.

[0036]

Explanation of Reference Numerals

[0037] 20…Magnetic element, 20D…Circuit, 20i…Element current, 21, 22…First and second magnetic layers, 21n~23n…First to third non-magnetic layers, 30D…Recording circuit, 30F…Opposite faces of the medium, 30c…Coil, 30i…Insulating member, 31, 32…First and second magnetic poles, 33…Shielding member, 38, 38a~38n…Terminals, 40…Magnetic component, 41~43…First to third magnetic parts, 41M~43M…Magnetization, 41h~43h…Heat flow, 41i~43i…Currents in the first to third magnetic parts, 50…Conductive component, 51~53…First to third conductive parts, 51i~53i…Currents in the first to third conductive parts, 55, 56a, 56b, 57a, 57b…Non-magnetic components, 60…Recording section, 70…Reproducing section, 71…Magnetic reproducing element, 72a, 72b…First and second reproducing magnetic shields, 80…Magnetic recording medium, 81…Magnetic recording layer, 82…Medium substrate, 83…Magnetization, 85…Direction of medium movement, θ1…Angle, 110~113, 120~123, 110a~113a, 112x, 113x, 120a~123a, 111b, 121b, 130…Magnetic heads, 150…Magnetic recording device, 154…Suspension, 155…Arm, 156…Voice coil motor, 157…Bearing section, 158…Head gimbal assembly, 159…Head slider, 159A…Air inflow side, 159B…Air outflow side, 160…Head stack assembly, 161…Bracket, 162…Coil, 180…Recording medium disk, 180M…Spindle motor, 181…Recording medium, 190…Signal processing section, 210…Magnetic recording device, AR, AR1…Arrows, D1~D3…First to third directions, Iw…Recording current, T1, T2…First and second terminals, W1, W2…First and second wirings, je…Electron flow Detailed implementation manners

[0038] Hereinafter, with reference to the accompanying drawings, each implementation manner of the present invention will be described.

[0039] The accompanying drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the ratio of the sizes between parts, etc. are not necessarily the same as the actual ones. Even when showing the same part, sometimes the mutual dimensions and ratios are different according to the accompanying drawings.

[0040] In the specification of the present application and each figure, the same reference numerals are given to the same elements as those described in the already shown accompanying drawings, and the detailed description is appropriately omitted.

[0041] (First implementation manner)

[0042] Figure 1 (a) and Figure 1 (b) are schematic diagrams illustrating the magnetic head of the first implementation manner.

[0043] Figure 1 (a) is a sectional view. Figure 1 (b) is a plan view Figure 1 observed from the arrow AR1 of (a).

[0044] Figure 2 is a schematic perspective view illustrating the magnetic head of the first embodiment.

[0045] Figure 3 is a schematic sectional view illustrating the magnetic recording apparatus of the first embodiment.

[0046] As Figure 3 shown, the magnetic recording apparatus 210 of the embodiment includes a magnetic head 110 and a circuit 20D. The magnetic recording apparatus 210 may also include a magnetic recording medium 80. In the magnetic recording apparatus 210, at least a recording operation is performed. In the recording operation, information is recorded on the magnetic recording medium 80 using the magnetic head 110.

[0047] The magnetic head 110 includes a recording section 60. As will be described later, the magnetic head 110 may also include a reproducing section. The recording section 60 includes a first magnetic pole 31, a second magnetic pole 32, and a magnetic element 20. The magnetic element 20 is disposed between the first magnetic pole 31 and the second magnetic pole 32.

[0048] For example, the first magnetic pole 31 and the second magnetic pole 32 form a magnetic circuit. The first magnetic pole 31 is, for example, a main magnetic pole. The second magnetic pole 32 is, for example, a trailing shield. Alternatively, the first magnetic pole 31 may be a trailing shield and the second magnetic pole 32 may be a main magnetic pole.

[0049] The direction from the magnetic recording medium 80 to the magnetic head 110 is defined as the Z-axis direction. One direction perpendicular to the Z-axis direction is defined as the X-axis direction. The direction perpendicular to the Z-axis direction and the X-axis direction is defined as the Y-axis direction. The Z-axis direction corresponds, for example, to the height direction. The X-axis direction corresponds, for example, to the along-track direction. The Y-axis direction corresponds, for example, to the cross-track direction. Along the along-track direction, the magnetic recording medium 80 and the magnetic head 110 move relative to each other. At a desired position on the magnetic recording medium 80, a magnetic field (recording magnetic field) generated from the magnetic head 110 is applied. The magnetization at the desired position on the magnetic recording medium 80 is controlled to a direction corresponding to the recording magnetic field. Thereby, information is recorded on the magnetic recording medium 80.

[0050] The direction from the first magnetic pole 31 to the second magnetic pole 32 is defined as the first direction D1. The first direction D1 substantially follows the X-axis direction. In the embodiment, the first direction D1 may be inclined at a small angle with respect to the X-axis direction. The absolute value of the angle between the first direction D1 and the X-axis direction is, for example, 30 degrees or less.

[0051] As Figure 3As shown, a coil 30c is provided. In this example, a part of the coil 30c is located between the first magnetic pole 31 and the second magnetic pole 32. In this example, a shielding member 33 is provided. In the X-axis direction, the first magnetic pole 31 is located between the shielding member 33 and the second magnetic pole 32. Another part of the coil 30c is located between the shielding member 33 and the first magnetic pole 31. An insulating portion 30i is provided in at least a part among these multiple elements. The shielding member 33 is, for example, a leading shielding member. The magnetic head 110 may also include side shielding members (not shown).

[0052] As Figure 3 shown, a recording current Iw is supplied from the recording circuit 30D to the coil 30c. A recording magnetic field corresponding to the recording current Iw is applied from the first magnetic pole 31 to the magnetic recording medium 80.

[0053] As Figure 3 shown, at least one of the first magnetic pole 31 and the second magnetic pole 31 includes a medium facing surface 30F. The medium facing surface 30F is, for example, an ABS (Air Bearing Surface). The medium facing surface 30F faces the magnetic recording medium 80, for example. The medium facing surface 30F is along the X-Y plane, for example. For example, the first direction D1 is along the medium facing surface 30F. The absolute value of the angle between the first direction D1 and the medium facing surface 30F is, for example, 30 degrees or less.

[0054] As Figure 3 shown, the circuit 20D is electrically connected to the magnetic element 20. In this example, the magnetic element 20 is electrically connected to the first magnetic pole 31 and the second magnetic pole 32. A first terminal T1 and a second terminal T2 are provided in the magnetic head 110. The first terminal T1 is electrically connected to the magnetic element 20 via the first wiring W1 and the first magnetic pole 31. The second terminal T2 is electrically connected to the magnetic element 20 via the second wiring W2 and the second magnetic pole 32. A current (for example, a direct current) is supplied from the circuit 20D to the magnetic element 20, for example.

[0055] As Figure 1 (a) shown, the magnetic element 20 includes a first magnetic layer 21. The first magnetic layer 21 is provided between the first magnetic pole 31 and the second magnetic pole 32. In this example, the magnetic element 20 further includes a first non-magnetic layer 21n and a second non-magnetic layer 22n. The first non-magnetic layer 21n is provided between the first magnetic pole 31 and the first magnetic layer 21. The second non-magnetic layer 22n is provided between the first magnetic layer 21 and the second magnetic pole 32. The first magnetic layer 21 is, for example, a ferromagnetic layer. The first magnetic layer 21 includes, for example, at least one selected from the group consisting of Fe, Co, and Ni.

[0056] For example, the first non-magnetic layer 21n may be in contact with the first magnetic pole 31 and the first magnetic layer 21. The second non-magnetic layer 22n may be in contact with the first magnetic layer 21 and the second magnetic pole 32.

[0057] As shown in Figure 1 (b), element current 20i is supplied to such a magnetic element 20. The element current 20i is supplied, for example, from the above-described circuit 20D. As shown in Figure 1 (b), the element current 20i has a direction from the first magnetic pole 31 to the second magnetic pole 32. As shown in Figure 1 (b), the electron flow je accompanying the element current 20i has a direction from the second magnetic pole 32 to the first magnetic pole 31.

[0058] For example, when the element current 20i above the threshold flows through the magnetic element 20, the direction of magnetization of the first magnetic layer 21 is reversed. As a result, the magnetic field (recording magnetic field) generated from the magnetic pole is less likely to be directed toward the magnetic element 20 and more likely to be directed toward the magnetic recording medium 80. The recording magnetic field is more effectively applied to the magnetic recording medium 80. As a result, more efficient recording can be performed. In this case, the magnetic element 20 functions as an FCL (Flux Control Layer).

[0059] As will be described later, the magnetic element 20 may further include other magnetic layers (second magnetic layer) and other non-magnetic layers (third non-magnetic layer). In this configuration, when the element current 20i above the threshold flows through the magnetic element 20, the magnetization of the magnetic layers (first magnetic layer 21 or second magnetic layer) included in the magnetic element 20 oscillates. The magnetic element 20 functions, for example, as an STO (Spin-Torque Oscillator). As a result of the oscillation, an alternating magnetic field (for example, a high-frequency magnetic field) is generated from the magnetic element 20. The alternating magnetic field generated in the magnetic element 20 is applied to the magnetic recording medium 80 to assist writing to the magnetic recording medium 80. For example, MAMR (Microwave Assisted Magnetic Recording) can be implemented.

[0060] In this way, by providing the magnetic element 20, more effective magnetic recording can be implemented. When the element current 20i flows through the magnetic element 20, the temperature of the magnetic element 20 may sometimes rise excessively and it may be difficult to obtain the desired operation. By effectively discharging the heat of the magnetic element 20, the rise in the temperature of the magnetic element 20 can be suppressed, and the desired operation can be efficiently implemented.

[0061] As shown in Figure 1 (b) and Figure 2 , in the embodiment, a magnetic member 40 is provided in the magnetic head 110. The magnetic member 40 includes a first magnetic portion 41. The magnetic member 40 may further include a second magnetic portion 42 and a third magnetic portion 43. The first magnetic portion 41, the second magnetic portion 42, and the third magnetic portion 43 include a magnetic material described later. InFigure 2 In this case, the insulating member 30i is omitted.

[0062] As Figure 1 (b) and Figure 2 As shown, the second direction D2 from the first magnetic portion 41 to the magnetic element 20 (e.g., the first magnetic layer 21) intersects the first direction D1 from the first magnetic pole 31 to the second magnetic pole 32.

[0063] When the magnetic member 40 includes the first magnetic portion 41 and the second magnetic portion 42, the magnetic element 20 (e.g., the first magnetic layer 21) is located between the first magnetic portion 41 and the second magnetic portion 42 in the second direction D2. The positions of the first magnetic portion 41 and the second magnetic portion 42 can be interchanged.

[0064] When the magnetic member 40 includes the third magnetic portion 43, the direction from the magnetic element 20 (e.g., the first magnetic layer 21) to the third magnetic portion 43 is along the third direction D3. The third direction D3 intersects the plane including the first direction D1 and the second direction D2. The third direction D3 may be substantially along the Z-axis direction. As Figure 1 (a) shows, the magnetic element 20 (the first magnetic layer 21) is located between the magnetic recording medium 80 and the third magnetic portion 43. For example, at least a part of the magnetic element 20 is located between the medium facing surface 30F and the third magnetic portion 43.

[0065] The first magnetic portion 41, the second magnetic portion 42, and the third magnetic portion 43 may be continuous with each other. The boundaries between the first magnetic portion 41, the second magnetic portion 42, and the third magnetic portion 43 may be clear or unclear. The first magnetic portion 41, the second magnetic portion 42, and the third magnetic portion 43 may also be disconnected. As will be described later, the first magnetic portion 41 may be provided at the position of the third magnetic portion 43.

[0066] The magnetic materials included in the first magnetic portion 41, the second magnetic portion 42, and the third magnetic portion 43 include at least any one of the first material, the second material, and the third material. The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga. The second material includes at least one selected from the group consisting of cubic or tetragonal compounds containing Mn and Ni, cubic alloys of Mn containing the γ-phase, and cubic alloys of Fe. The third material includes an antiferromagnet.

[0067] By flowing a current in a state where a magnetic field is applied to a magnetic member 40 containing such a magnetic material, heat of the magnetic element 20 can be efficiently transferred and discharged. For example, the magnetic element 20 is cooled. This is caused by, for example, an abnormal Ettingshausen effect. Thereby, an increase in the temperature of the magnetic element 20 can be suppressed, and a desired operation can be efficiently performed. For example, by reversing the direction of magnetization of the magnetic layer, a recording magnetic field is effectively applied to the magnetic recording medium 80. Or, stable magnetization oscillation can be obtained, and an efficient auxiliary operation can be performed. Thereby, a magnetic head capable of increasing the recording density can be provided.

[0068] The magnetic field applied to the magnetic member 40 may be, for example, a magnetic field generated from at least any one of the first magnetic pole 31 and the second magnetic pole 32. The magnetic field applied to the magnetic member 40 may also be, for example, a magnetic field generated from a side shield. For example, the magnetic field applied to the magnetic member 40 may also be a magnetic field based on the element current 20i flowing in the magnetic element 20.

[0069] As Figure 1 (a) and Figure 1 (b) show, the magnetic head 110 may include a plurality of terminals 38. The plurality of terminals 38 may include, for example, terminals 38a to 38h and the like. At least two of these terminals 38 may be shared. Currents are supplied to the magnetic element 20 and the magnetic member 40 through these plurality of terminals 38. For example, the terminal 38a may correspond to Figure 3 the first terminal T1 illustrated. For example, the terminal 38b may correspond to Figure 3 the second terminal T2 illustrated.

[0070] As Figure 1 (b) shows, for example, the element current 20i supplied through at least a part of the plurality of terminals 38 (for example, terminals 38a and 38b) flows through the magnetic element 20 along the first direction D1. Thereby, the magnetization of the first magnetic layer 21 is reversed. Or, oscillation is generated.

[0071] The first magnetic part current 41i supplied through at least a part of the plurality of terminals 38 (terminals 38c and 38d) flows through the first magnetic part 41 along the first direction D1. Thereby, a heat flow 41h is generated. The direction of the heat flow 41h includes, for example, a component in the direction from the magnetic element 20 to the first magnetic part 41. Through the heat flow 41h, heat of the magnetic element 20 can be efficiently discharged.

[0072] As Figure 1As shown in (b), the second magnetic part current 42i supplied through at least a part of the plurality of terminals 38 (terminals 38e and 38f) flows through the second magnetic part 42 along the first direction D1. Thereby, a heat flow 42h is generated. The direction of the heat flow 42h includes, for example, a component in the direction from the magnetic element 20 to the second magnetic part 42. Through the heat flow 42h, the heat of the magnetic element 20 can be efficiently discharged.

[0073] As Figure 1 As shown in (a), the third magnetic part current 43i supplied through at least a part of the plurality of terminals 38 (terminals 38g and 38h) flows through the third magnetic part 43 along the first direction D1. Thereby, a heat flow 43h is generated. The direction of the heat flow 43h includes, for example, a component in the direction from the magnetic element 20 to the third magnetic part 43. Through the heat flow 43h, the heat of the magnetic element 20 can be efficiently discharged.

[0074] For example, at least any one of the terminals 38a to 38h may be omitted, and at least any one of the first to third magnetic part currents 41i to 43i may be supplied through the terminals 38a and 38b (for example, the first terminal T1 and the second terminal T2).

[0075] As Figure 1 As shown in (b), the direction of the magnetization 41M of the first magnetic part 41 may be along the third direction D3. The third direction D3 intersects the plane including the first direction D1 and the second direction D2. The direction of the magnetization 42M of the second magnetic part 42 may be along the third direction D3. The direction of the magnetization 42M of the second magnetic part 42 preferably includes a component opposite to the direction of the magnetization 41M of the first magnetic part 41. It is easy to obtain stable magnetization. It is easy to discharge heat. As Figure 1 As shown in (a), the direction of the magnetization 43M of the third magnetic part 43 may be along the second direction D2. The direction of the magnetization 43M of the third magnetic part 43 preferably includes a component along the direction of the magnetic field generated by the magnetization 41M of the first magnetic part 41 and the magnetization 42M of the second magnetic part 42. It is easy to obtain stable magnetization. It is easy to discharge heat. For example, in the first magnetic part 41, the second magnetic part 42, and the third magnetic part 43, the direction of magnetization may change continuously.

[0076] When the magnetic material of the magnetic component 40 is antiferromagnetic, the direction of magnetization in the first to third magnetic parts 41 to 43 may be unclear.

[0077] For example, the first to third magnetic parts 41 to 43 do not overlap with the first magnetic pole 31 in the second direction D2. For example, the first to third magnetic parts 41 to 43 do not overlap with the second magnetic pole 32 in the second direction D2.

[0078] Figure 4 (a) and Figure 4(b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0079] Figure 4 (a) is a cross-sectional view. Figure 4 (b) is from Figure 4 a plan view observed from the arrow AR1 of (a).

[0080] As Figure 4 (a) and Figure 4 (b) show, similarly in the magnetic head 111 of the embodiment, the magnetic member 40 includes first to third magnetic parts 41 to 43. In the magnetic head 111, the direction of the first magnetic part current 41i is opposite to the direction of the element current 20i. For example, the direction of the second magnetic part current 42i is opposite to the direction of the element current 20i. The direction of the third magnetic part current 43i is opposite to the direction of the element current 20i. Similarly in the magnetic head 111, the first to third magnetic part currents 41i to 43i are along the first direction D1.

[0081] For example, in the magnetic head 111, the sign of the magnetothermoelectric effect in the magnetic material contained in the magnetic member 40 is opposite to that in the magnetic head 110. Or, for example, in the magnetic head 111, the direction of magnetization in the magnetic member 40 is opposite to that in the magnetic head 110. Similarly in the magnetic head 111, through the heat flows 41h to 43h, the heat of the magnetic element 20 can be efficiently discharged.

[0082] The magnetic field applied to the magnetic member 40 can be, for example, a magnetic field generated from at least one of the first magnetic pole 31 and the second magnetic pole 32. The magnetic field applied to the magnetic member 40 can also be, for example, a magnetic field generated from the side shield. For example, the magnetic field applied to the magnetic member 40 can further be, for example, a magnetic field based on the element current 20i flowing in the magnetic element 20.

[0083] Figure 5 (a) and Figure 5 (b) are schematic diagrams illustrating the magnetic head of the first embodiment.

[0084] Figure 5 (a) is a cross-sectional view. Figure 5 (b) is from Figure 5 a plan view observed from the arrow AR1 of (a).

[0085] As Figure 5 (a) and Figure 5 (b) show, the magnetic head 112 of the embodiment further includes a conductive member 50. The configuration of the magnetic head 112 other than this can be the same as the configuration of the magnetic head 110 or the magnetic head 111.

[0086] The conductive member 50 includes a first conductive part 51. In this example, the conductive member 50 further includes a second conductive part 52 and a third conductive part 53.

[0087] The direction from the first conductive portion 51 to the first magnetic portion 41 is along the second direction D2. The element current 20i supplied via at least a part of the plurality of terminals 38 (terminals 38a and 38b) flows through the magnetic element 20 along the first direction D1. The first magnetic portion current 41i supplied via at least a part of the plurality of terminals 38 (terminals 38c and 38d) flows through the first magnetic portion 41 along the first direction D1. The first conductive portion current 51i supplied via at least a part of the plurality of terminals 38 (terminals 38i and 38j) flows through the first conductive portion 51 along the first direction D1.

[0088] When the first conductive portion current 51i flows in such a conductive member 50 (first conductive portion 51), the magnetization of the magnetic member 40 (first magnetic portion 41) is appropriately controlled. This is, for example, based on the spin-orbit torque injected from the conductive member 50 into the magnetic member 40. For example, when the direction of the recording magnetic field generated in at least either the first magnetic pole 31 or the second magnetic pole 32 changes, the magnetization of the magnetic member 40 is also appropriately controlled. By supplying current (first to third magnetic portion currents 41i to 43i) to such a magnetic member 40, a heat flow 41h and the like are appropriately generated. Thereby, the heat of the magnetic element 20 can be efficiently discharged.

[0089] For example, in the magnetic head 112, the sign of the magnetothermoelectric effect in the magnetic material contained in the magnetic member 40 is the same as that in the magnetic head 110, and the conductive member 50 (first to third conductive portions 51 to 53) includes, for example, at least one selected from the group consisting of Pt, Pd, and Au. The conductive member 50 includes, for example, heavy metals. In these materials, the sign of the spin-orbit torque (for example, the spin Hall angle) is positive. By flowing current in the conductive member 50 containing such materials, the magnetization of the magnetic member 40 can be efficiently controlled.

[0090] Alternatively, for example, in the magnetic head 112, the sign of the magnetothermoelectric effect in the magnetic material contained in the magnetic member 40 is opposite to that in the magnetic head 110, and the conductive member 50 (first to third conductive portions 51 to 53) includes, for example, at least one selected from the group consisting of Ta (for example, β-Ta) and W (for example, β-W). The conductive member 50 contains, for example, heavy metals. In these materials, the sign of the spin-orbit torque (for example, the spin Hall angle) is negative. By flowing current in the conductive member 50 containing such materials, the magnetization of the magnetic member 40 can be efficiently controlled.

[0091] As Figure 5As shown in (b), the first magnetic layer 21 is located between the first conductive portion 51 and the second conductive portion 52 in the second direction D2. As already described, the second magnetic portion current 42i supplied via at least a part of the plurality of terminals 38 (terminals 38e and 38f) flows through the second magnetic portion 42 along the first direction D1. The second conductive portion current 52i supplied via at least a part of the plurality of terminals 38 (terminals 38k and 38l) flows through the second conductive portion 52 along the first direction D1.

[0092] As Figure 5 As shown in (b), in this example, the first magnetic portion 41 is located between the first conductive portion 51 and the magnetic element 20 (the first magnetic layer 21) in the second direction D2. The second magnetic portion 42 is located between the magnetic element 20 (the first magnetic layer 21) and the second conductive portion 52 in the second direction D2.

[0093] As Figure 5 As shown in (a), the direction from the magnetic element 20 (the first magnetic layer 21) to the third conductive portion 53 is along the third direction D3. In this example, the third magnetic portion 43 is located between the magnetic element 20 (the first magnetic layer 21) and the third conductive portion 53. As already described, the third magnetic portion current 43i supplied via at least a part of the plurality of terminals 38 (terminals 38g and 38h) flows through the third magnetic portion 43 along the first direction D1. The third conductive portion current 53i supplied via at least a part of the plurality of terminals 38 (terminals 38m and 38n) flows through the third conductive portion 53 along the first direction D1.

[0094] For example, at least any one of the terminals 38i to 38n may be omitted, and at least any one of the first to third conductive portion currents 51i to 53i may be supplied via the terminals 38a and 38b (for example, the first terminal T1 and the second terminal T2). At least any one of the first to third conductive portion currents 51i to 53i may also be supplied via at least any one of the terminals 38a to 38h.

[0095] In one example, the conductive member 50 is in contact with the magnetic member 40. As will be described later, a non-magnetic member may also be provided between the conductive member 50 and the magnetic member 40.

[0096] Figure 6 (a) and Figure 6 (b) are schematic views illustrating the magnetic head of the first embodiment.

[0097] Figure 6 (a) is a cross-sectional view. Figure 6 (b) is a plan view observed from the arrow AR1 in Figure 6 (a).

[0098] As Figure 6(a) and Figure 6 As shown in (b), the magnetic head 113 of the embodiment further includes a conductive member 50. The configuration of the magnetic head 113 other than this can be the same as that of the magnetic head 110 or the magnetic head 111. The conductive member 50 includes a first conductive portion 51. In this example, the conductive member 50 further includes a second conductive portion 52 and a third conductive portion 53.

[0099] Similarly in the magnetic head 113, the direction from the first conductive portion 51 to the first magnetic portion 41 is along the second direction D2. In the magnetic head 113, the first conductive portion 51 is located between the first magnetic portion 41 and the magnetic element 20 (the first magnetic layer 21) in the second direction D2. The second conductive portion 52 is located between the magnetic element 20 (the first magnetic layer 21) and the second magnetic portion 42 in the second direction D2. The third conductive portion 53 is located between the magnetic element 20 (the first magnetic layer 21) and the third magnetic portion 43.

[0100] In the magnetic head 113, the sign of the magnetothermoelectric effect in the magnetic material contained in the magnetic member 40 is the same as that in the magnetic head 110, and the conductive member 50 (the first to third conductive portions 51 to 53) includes, for example, at least one selected from the group consisting of Ta (for example, β-Ta) and W (for example, β-W). The conductive member 50 includes, for example, heavy metals. In these materials, the sign of the spin-orbit torque (for example, the spin Hall angle) is negative. By flowing a current through the conductive member 50 containing such a material, the magnetization of the magnetic member 40 can be efficiently controlled.

[0101] For example, in the magnetic head 113, the sign of the magnetothermoelectric effect in the magnetic material contained in the magnetic member 40 is opposite to that in the magnetic head 110, and the conductive member 50 (the first to third conductive portions 51 to 53) includes, for example, at least one selected from the group consisting of Pt, Pd, and Au. The conductive member 50 includes, for example, heavy metals. In these materials, the sign of the spin-orbit torque (for example, the spin Hall angle) is positive. By flowing a current through the conductive member 50 containing such a material, the magnetization of the magnetic member 40 can be efficiently controlled.

[0102] For example, by flowing a current (the first to third conductive portion currents 51i to 53i) through the conductive member 50 (the first to third conductive portions 51 to 53), the magnetization of the magnetic member 40 (the first to third magnetic portions 41 to 43) is appropriately controlled. This is, for example, based on the spin-orbit torque injected from the conductive member 50 into the magnetic member 40. For example, when the direction of the recording magnetic field generated in at least one of the first magnetic pole 31 and the second magnetic pole 32 changes, the magnetization of the magnetic member 40 is also appropriately controlled. By supplying a current (the first to third magnetic portion currents 41i to 43i) to such a magnetic member 40, heat flows 41h to 43h, etc. are appropriately generated. Thereby, the heat of the magnetic element 20 can be efficiently discharged.

[0103] In the example of the magnetic heads 110 to 113, the direction from the first magnetic portion 41 toward the magnetic element 20 (second direction D2) is along the medium facing surface 30F. For example, the first magnetic portion 41 faces the side surface of the magnetic element 20. As already described, the first direction D1 is along the medium facing surface 30F. For example, the absolute value of the angle between the first direction D1 and the medium facing surface 30F is 30 degrees or less (it may also be 10 or less). As will be described below, the first magnetic portion 41 provided on the magnetic member 40 may also be provided above the magnetic element 20.

[0104] Figure 7 (a) and Figure 7 (b) are schematic views illustrating the magnetic head of the first embodiment.

[0105] Figure 7 (a) is a cross-sectional view. Figure 7 (b) is a plan view observed from the arrow AR1 in Figure 7 (a).

[0106] As Figure 7 (a) and Figure 7 (b) show, the magnetic head 112x of the embodiment includes a non-magnetic member 55. The configuration of the magnetic head 112x other than this may be the same as the configuration of the magnetic head 112. The non-magnetic member 55 is provided between the magnetic member 40 and the conductive member 50. The non-magnetic member 55 may be in contact with the magnetic member 40 and the conductive member 50. The non-magnetic member 55 includes, for example, at least one selected from the group consisting of Cu, Au, Cr, Al, V, and Ag. For example, the spin-orbit torque is efficiently transmitted between the magnetic member 40 and the conductive member 50 through the non-magnetic member 55.

[0107] Figure 8 (a) and Figure 8 (b) are schematic views illustrating the magnetic head of the first embodiment.

[0108] Figure 8 (a) is a cross-sectional view. Figure 8 (b) is from Figure 8 (a) observed from the arrow AR1.

[0109] As Figure 8 (a) and Figure 8As shown in (b), the head 113x of the embodiment includes a non-magnetic member 55. The configuration of the head 113x other than this can be the same as that of the head 113. The non-magnetic member 55 is provided between the magnetic member 40 and the conductive member 50. The non-magnetic member 55 may be in contact with the magnetic member 40 and the conductive member 50. The non-magnetic member 55 includes, for example, at least one selected from the group consisting of Cu, Au, Cr, Al, V, and Ag. For example, the spin-orbit torque is efficiently transmitted between the magnetic member 40 and the conductive member 50 through the non-magnetic member 55.

[0110] Figure 9 (a) and Figure 9 (b) are schematic views illustrating the head of the first embodiment.

[0111] Figure 9 (a) is a cross-sectional view. Figure 9 (b) is a plan view observed from the arrow AR1 in Figure 9 (a).

[0112] As Figure 9 (a) and Figure 9 As shown in (b), in the head 120 of the embodiment, the magnetic member 40 includes a first magnetic portion 41. The second direction D2 from the first magnetic portion 41 to the magnetic element 20 intersects the medium facing surface 30F. The configuration of the head 120 other than this can be the same as that of the head 110.

[0113] For example, at least one of the terminals 38c and 38d may be omitted, and the first magnetic portion current 41i may be supplied via the terminals 38a and 38b (for example, the first terminal T1 and the second terminal T2).

[0114] Figure 10 (a) and Figure 10 (b) are schematic views illustrating the head of the first embodiment.

[0115] Figure 10 (a) is a cross-sectional view. Figure 10 (b) is a plan view observed from the arrow AR1 in Figure 10 (a).

[0116] As Figure 10 (a) and Figure 10 As shown in (b), similarly in the head 121 of the embodiment, the second direction D2 from the first magnetic portion 41 to the magnetic element 20 intersects the medium facing surface 30F. The configuration of the head 121 other than this can be the same as that of the head 111. In the head 121, the direction of the first magnetic portion current 41i is opposite to the direction of the element current 20i.

[0117] Figure 11 (a) andFigure 11 (b) is a schematic diagram illustrating the magnetic head of the first embodiment.

[0118] Figure 11 (a) is a cross-sectional view. Figure 11 (b) is from Figure 11 (a) The plan view observed from the arrow AR1.

[0119] As Figure 11 (a) and Figure 11 (b) shows, similarly in the magnetic head 122 of the embodiment, the second direction D2 from the first magnetic portion 41 to the magnetic element 20 intersects the medium facing surface 30F. The configuration of the magnetic head 122 other than this can be the same as the configuration of the magnetic head 112.

[0120] Figure 12 (a) and Figure 12 (b) are schematic diagrams illustrating the magnetic head of the first embodiment.

[0121] Figure 12 (a) is a cross-sectional view. Figure 12 (b) is from Figure 12 (a) The plan view observed from the arrow AR1.

[0122] As Figure 12 (a) and Figure 12 (b) shows, similarly in the magnetic head 123 of the embodiment, the second direction D2 from the first magnetic portion 41 to the magnetic element 20 intersects the medium facing surface 30F. The configuration of the magnetic head 123 other than this can be the same as the configuration of the magnetic head 113.

[0123] In the magnetic heads 121 and 123, it is possible to omit the non-magnetic member 55, and the conductive member 50 is in contact with the magnetic member 40. In the magnetic heads 120 to 123, the first direction D1 is along the medium facing surface 30F. The absolute value of the angle between the first direction D1 and the medium facing surface 30F is 30 degrees or less.

[0124] Figure 13 (a), Figure 13 (b), Figure 14 (a), Figure 14 (b), Figure 15 (a), Figure 15 (b), Figure 16 (a), Figure 16 (b), Figure 17 (a), Figure 17 (b), Figure 18 (a), Figure 18 (b), Figure 19 (a), Figure 19 (b), Figure 20 (a), Figure 20(b), Figure 21 (a), Figure 21 (b), Figure 22 (a) and Figure 22 (b) are schematic views illustrating the magnetic head of the first embodiment.

[0125] Figure 13 (a) to Figure 22 (a) is a cross-sectional view. Figure 13 (b) to Figure 22 (b) are respectively plan views observed from the arrow AR1 of Figure 13 (a) to Figure 22 (a).

[0126] In Figure 13 (a) and Figure 13 (b) of the magnetic head 110a of the illustrated embodiment, the first to third magnetic parts 41 to 43 are continuous with each other. One end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the magnetic member 40 (the first to third magnetic parts 41 to 43) is electrically connected to the first magnetic pole 31. The other end of the magnetic member 40 (the first to third magnetic parts 41 to 43) is electrically connected to the second magnetic pole 32. In this example, the terminal 38a is electrically connected to the first magnetic pole 31. The terminal 38b is electrically connected to the second magnetic pole 32. The element current 20i and the first to third magnetic part currents 41i to 43i are supplied via these terminals. In the magnetic head 110a, at least one of the non-magnetic members 56a and the non-magnetic member 56b can be provided. At least a part of the non-magnetic member 56a is provided between the first magnetic pole 31 and the magnetic member 40. At least a part of the non-magnetic member 56b is provided between the magnetic member 40 and the second magnetic pole 32. At least one of the non-magnetic member 56a and the non-magnetic member 56b includes, for example, a metal or the like.

[0127] In Figure 14 (a) and Figure 14 (b) of the magnetic head 111a of the illustrated embodiment, the first to third magnetic parts 41 to 43 are continuous with each other. One end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the magnetic member 40 (the first to third magnetic parts 41 to 43) is electrically connected to the second magnetic pole 32. The terminal 38a is electrically connected to the first magnetic pole 31. The terminal 38b is electrically connected to the other end of the magnetic member 40. The element current 20i and the first to third magnetic part currents 41i to 43i are supplied via these terminals.

[0128] In Figure 15 (a) and Figure 15(b) In the magnetic head 111b of the illustrated embodiment, the first to third magnetic portions 41 to 43 are continuous with each other. One end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the magnetic member 40 (the first to third magnetic portions 41 to 43) is electrically connected to the first magnetic pole 31. The terminal 38b is electrically connected to the second magnetic pole 32. The terminal 38a is electrically connected to the other end of the magnetic member 40. The element current 20i and the first to third magnetic portion currents 41i to 43i are supplied via these terminals.

[0129] In Figure 16 (a), Figure 16 (b), Figure 17 (a) and Figure 17 (b) In the magnetic heads 112a and 113a of the illustrated embodiments, the first to third magnetic portions 41 to 43 are continuous with each other. One end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the magnetic member 40 (the first to third magnetic portions 41 to 43) is electrically connected to the first magnetic pole 31. The other end of the magnetic member 40 (the first to third magnetic portions 41 to 43) is electrically connected to the second magnetic pole 32. One end of the conductive member 50 (the first to third conductive portions 51 to 53) is electrically connected to the first magnetic pole 31. The other end of the conductive member 50 (the first to third conductive portions 51 to 53) is electrically connected to the first magnetic pole 31. The terminal 38a is electrically connected to the first magnetic pole 31. The terminal 38b is electrically connected to the second magnetic pole 32. The element current 20i, the first to third magnetic portion currents 41i to 43i, and the first to third conductive portion currents 51i to 53i are supplied via these terminals.

[0130] In the magnetic heads 112a and 113a, at least any one of the above non-magnetic members 56a and non-magnetic member 56b can be provided. In the magnetic heads 112a and 113a, at least any one of the non-magnetic members 57a and non-magnetic member 57b can also be provided. At least a part of the non-magnetic member 57a is provided between the first magnetic pole 31 and the conductive member 50. At least a part of the non-magnetic member 57b is provided between the conductive member 50 and the second magnetic pole 32. At least any one of the non-magnetic member 57a and non-magnetic member 57b includes, for example, at least one selected from the group consisting of Cu, Au, Cr, Al, V, Ag, Ru, Ir, Ta, Rh, Pd, Pt, and W. The non-magnetic members 57a and 57b can also include any conductive material.

[0131] In Figure 18 (a) and Figure 18(b) In the magnetic head 120a of the illustrated embodiment, one end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the first magnetic portion 41 is electrically connected to the first magnetic pole 31. The other end of the first magnetic portion 41 is electrically connected to the second magnetic pole 32. In this example, the terminal 38a is electrically connected to the first magnetic pole 31. The terminal 38b is electrically connected to the second magnetic pole 32. The element current 20i and the first to third magnetic portion currents 41i to 43i are supplied via these terminals.

[0132] In Figure 19 (a) and Figure 19 (b) In the magnetic head 121a of the illustrated embodiment, one end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the first magnetic portion 41 is electrically connected to the second magnetic pole 32. In this example, the terminal 38a is electrically connected to the first magnetic pole 31. The terminal 38b is electrically connected to the other end of the first magnetic portion 41. The element current 20i and the first magnetic portion current 41i are supplied via these terminals.

[0133] In Figure 20 (a) and Figure 20 (b) In the magnetic head 121b of the illustrated embodiment, one end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the first magnetic portion 41 is electrically connected to the first magnetic pole 31. In this example, the terminal 38a is electrically connected to the other end of the magnetic member 40. The terminal 38b is electrically connected to the first magnetic pole 32. The element current 20i and the first magnetic portion current 41i are supplied via these terminals.

[0134] In Figure 21 (a), Figure 21 (b), Figure 22 (a) and Figure 22 (b) In the magnetic heads 122a and 123a of the illustrated embodiments, one end of the magnetic element 20 is electrically connected to the first magnetic pole 31. The other end of the magnetic element 20 is electrically connected to the second magnetic pole 32. One end of the first magnetic portion 41 is electrically connected to the first magnetic pole 31. The other end of the first magnetic portion 41 is electrically connected to the second magnetic pole 32. One end of the first conductive portion 51 is electrically connected to the first magnetic pole 31. The other end of the first conductive portion 51 is electrically connected to the first magnetic pole 31. The terminal 38a is electrically connected to the first magnetic pole 31. The terminal 38b is electrically connected to the second magnetic pole 32. The element current 20i, the first magnetic portion current 41i, and the first conductive portion current 51i are supplied via these terminals.

[0135] Among the magnetic heads 110a to 113a, 120a to 123a, 111b, and 121b, the configurations other than those described above can be the same as the configurations of the magnetic heads 110 to 113 and 120 to 123, respectively.

[0136] Figure 23 It is a schematic cross-sectional view illustrating the magnetic head of the first embodiment.

[0137] As Figure 23 shown, in the magnetic head 130, the magnetic element 20 includes a first magnetic layer 21, a second magnetic layer 22, a first non-magnetic layer 21n, a second non-magnetic layer 22n, and a third non-magnetic layer 23n. The first magnetic layer 21 is disposed between the first magnetic pole 31 and the second magnetic pole 32. The second magnetic layer 22 is disposed between the first magnetic layer 21 and the second magnetic pole 32. The first non-magnetic layer 21n is disposed between the first magnetic pole 31 and the first magnetic layer 21. The second non-magnetic layer 22n is disposed between the first magnetic layer 21 and the second magnetic layer 22. The third non-magnetic layer 23n is disposed between the second magnetic layer 22 and the second magnetic pole 32.

[0138] The first magnetic layer 21 and the second magnetic layer 22 include, for example, at least one selected from the group consisting of Fe, Co, and Ni. The first magnetic layer 21 and the second magnetic layer 22 are, for example, ferromagnetic layers.

[0139] The first non-magnetic layer 21n includes, for example, at least one selected from the group consisting of Cu, Au, Cr, Al, V, and Ag. The second non-magnetic layer 22n includes, for example, at least one selected from the group consisting of Cu, Au, Cr, Al, V, and Ag. The third non-magnetic layer 23n includes, for example, at least one selected from the group consisting of Ru, Ir, Ta, Rh, Pd, Pt, and W.

[0140] When an element current 20i above the threshold flows through such a magnetic element 20, an alternating magnetic field (high-frequency magnetic field) is generated from the magnetic element 20. One of the first magnetic layer 21 and the second magnetic layer 22 functions as, for example, an oscillation layer. The other of the first magnetic layer 21 and the second magnetic layer 22 functions as, for example, a spin injection layer. The magnetic element 20 functions as an STO. For example, when the circuit 20D (refer to Figure 3 ) supplies the element current 20i to the magnetic element 20, an alternating magnetic field is generated from the magnetic element 20. The frequency of the alternating magnetic field is, for example, 20 GHz or more and 40 GHz or less.

[0141] The configuration of the magnetic head 130 can be applied to the magnetic heads 110 to 113, the magnetic heads 120 to 123, the magnetic heads 110a to 113a, the magnetic heads 120a to 123a, the magnetic head 111b, and the magnetic head 121b, etc.

[0142] In an embodiment, the first magnetic layer 21 may also include a plurality of magnetic regions arranged along the X-axis direction. The second magnetic layer 22 may also include a plurality of magnetic regions arranged along the X-axis direction. The boundary between the plurality of magnetic regions may be clear or unclear. For example, the plurality of magnetic regions are continuous.

[0143] In an embodiment, the first magnetic pole 31 may also include a plurality of magnetic regions arranged along the X-axis direction. The second magnetic pole 32 may also include a plurality of magnetic regions arranged along the X-axis direction. The first magnetic layer 21 may also include a plurality of magnetic regions arranged along the X-axis direction. The second magnetic layer 22 may also include a plurality of magnetic regions arranged along the X-axis direction. The boundary between the plurality of magnetic regions may be clear or unclear. For example, the plurality of magnetic regions are continuous.

[0144] In the above example, heat of the magnetic element 20 is discharged by the flow of current in the magnetic member 40. In other examples of the embodiment, the direction of the current may also be opposite to the direction of the current when the heat of the magnetic element 20 is discharged. In this case, the temperature of the magnetic element 20 rises. As a result, in the magnetic element 20, for example, the reversal speed of magnetization increases. For example, the time until oscillation starts becomes shorter.

[0145] Hereinafter, examples of the magnetic head and the magnetic recording medium 80 included in the magnetic recording device 210 of the embodiment will be described. The following description can be applied to any magnetic head of the embodiment. In the following drawings, the insulating member 30i, the magnetic member 40, and the conductive member 50 are omitted.

[0146] Figure 24 It is a schematic cross-sectional view illustrating a magnetic head of the embodiment.

[0147] As Figure 24 shown, in the magnetic head (e.g., magnetic head 110) of the embodiment, the first direction D1 from the first magnetic pole 31 to the second magnetic pole 32 may be inclined with respect to the X-axis direction. The first direction D1 corresponds to the stacking direction of the magnetic element 20. The X-axis direction is along the medium facing surface 30F. Let the angle between the first direction D1 and the medium facing surface 30F be the angle θ1. The angle θ1 is, for example, 15 degrees or more and 30 degrees or less. The angle θ1 may also be 0 degrees.

[0148] When the first direction D1 is inclined with respect to the X-axis direction, the thickness of the layer corresponds to the length along the first direction D1. The configuration in which the first direction D1 is inclined with respect to the X-axis direction can be applied to any magnetic head of the embodiment. For example, the interface between the first magnetic pole 31 and the magnetic element 20 and the interface between the magnetic element 20 and the second magnetic pole 32 may be inclined with respect to the X-axis direction.

[0149] Figure 25It is a schematic perspective view illustrating a magnetic recording apparatus according to an embodiment.

[0150] As Figure 25 shown, a magnetic head (e.g., magnetic head 110) according to an embodiment is used together with a magnetic recording medium 80. In this example, the magnetic head 110 includes a recording section 60 and a reproducing section 70. Information is recorded on the magnetic recording medium 80 through the recording section 60 of the magnetic head 110. Information recorded on the magnetic recording medium 80 is reproduced through the reproducing section 70.

[0151] The magnetic recording medium 80 includes, for example, a medium substrate 82 and a magnetic recording layer 81 provided on the medium substrate 82. The magnetization 83 of the magnetic recording layer 81 is controlled by the recording section 60. For example, perpendicular magnetic recording is performed.

[0152] The reproducing section 70 includes, for example, a first reproducing magnetic shield 72a, a second reproducing magnetic shield 72b, and a magnetic reproducing element 71. The magnetic reproducing element 71 is provided between the first reproducing magnetic shield 72a and the second reproducing magnetic shield 72b. The magnetic reproducing element 71 can output a signal corresponding to the magnetization 83 of the magnetic recording layer 81.

[0153] As Figure 25 shown, the magnetic recording medium 80 relatively moves with respect to the magnetic head 110 in the direction of the medium moving direction 85. Through the magnetic head 110, information corresponding to the magnetization 83 of the magnetic recording layer 81 is controlled at an arbitrary position. Through the magnetic head 110, information corresponding to the magnetization 83 of the magnetic recording layer 81 is reproduced at an arbitrary position.

[0154] Figure 26 It is a schematic perspective view illustrating a part of a magnetic recording apparatus according to an embodiment.

[0155] Figure 26 A head slider is illustrated.

[0156] The magnetic head 110 is provided on the head slider 159. The head slider 159 includes, for example, Al2O3 / TiC or the like. The head slider 159 relatively moves with respect to the magnetic recording medium while floating or contacting the magnetic recording medium.

[0157] The head slider 159 has, for example, an air inflow side 159A and an air outflow side 159B. The magnetic head 110 is provided on the side surface of the air outflow side 159B of the head slider 159 or the like. Thus, the magnetic head 110 relatively moves with respect to the magnetic recording medium while floating or contacting the magnetic recording medium.

[0158] Figure 27 It is a schematic perspective view illustrating a magnetic recording apparatus according to an embodiment.

[0159] As Figure 27As shown, in the magnetic recording device 150 of the embodiment, a rotary actuator is employed. The recording medium disk 180 is mounted on the spindle motor 180M. The recording medium disk 180 rotates in the direction of arrow AR by the spindle motor 180M. The spindle motor 180M responds to a control signal from the drive device control unit. The magnetic recording device 150 of the present embodiment may include a plurality of recording medium disks 180. The magnetic recording device 150 may include a recording medium 181. The recording medium 181 is, for example, an SSD (Solid State Drive). The recording medium 181 employs a non-volatile memory such as a flash memory. For example, the magnetic recording device 150 may be a hybrid HDD (Hard Disk Drive).

[0160] The head slider 159 records and reproduces information recorded on the recording medium disk 180. The head slider 159 is provided at the tip of the thin-film suspension 154. A magnetic head of the embodiment is provided near the tip of the head slider 159.

[0161] When the recording medium disk 180 rotates, the pressing force generated by the suspension 154 and the pressure generated on the medium facing surface (ABS) of the head slider 159 are balanced. The distance between the medium facing surface of the head slider 159 and the surface of the recording medium disk 180 becomes a predetermined floating amount. In the embodiment, the head slider 159 may also be in contact with the recording medium disk 180. For example, a contact advancing type may be applicable.

[0162] The suspension 154 is connected to one end of the arm 155 (for example, the actuator arm). The arm 155 has, for example, a bobbin portion. The bobbin portion holds the drive coil. A voice coil motor 156 is provided at the other end of the arm 155. The voice coil motor 156 is a type of linear motor. The voice coil motor 156 includes, for example, a drive coil and a magnetic circuit. The drive coil is wound around the bobbin portion of the arm 155. The magnetic circuit includes a permanent magnet and a relative yoke. The drive coil is provided between the permanent magnet and the relative yoke. The suspension 154 has one end and the other end. The magnetic head is provided at one end of the suspension 154. The arm 155 is connected to the other end of the suspension 154.

[0163] The arm 155 is held by a ball bearing. The ball bearing is provided at two positions above and below the bearing portion 157. The arm 155 can rotate and slide by the voice coil motor 156. The magnetic head can move to any position on the recording medium disk 180.

[0164] Figure 28 (a) and Figure 28 (b) are schematic perspective views illustrating a part of the magnetic recording device of the embodiment.

[0165] Figure 28 (a) illustrates the configuration of a part of the magnetic recording device and is an enlarged perspective view of the head stack assembly 160.Figure 28 (b) is a perspective view illustrating a head gimbal assembly (HGA) 158 that is part of the head stack assembly 160.

[0166] As Figure 28 shown in (a), the head stack assembly 160 includes a bearing portion 157, a head gimbal assembly 158, and a bracket 161. The head gimbal assembly 158 extends from the bearing portion 157. The bracket 161 extends from the bearing portion 157. The direction in which the bracket 161 extends is opposite to the direction in which the head gimbal assembly 158 extends. The bracket 161 supports the coil 162 of the voice coil motor 156.

[0167] As Figure 28 shown in (b), the head gimbal assembly 158 has an arm 155 that extends from the bearing portion 157 and a suspension 154 that extends from the arm 155.

[0168] A head slider 159 is provided at the top end of the suspension 154. A magnetic head of the embodiment is provided on the head slider 159.

[0169] The magnetic head assembly (head gimbal assembly) 158 of the embodiment includes the magnetic head of the embodiment, the head slider 159 provided with the magnetic head, the suspension 154, and the arm 155. The head slider 159 is provided at one end of the suspension 154. The arm 155 is connected to the other end of the suspension 154.

[0170] The suspension 154 has, for example, wires (not shown) for recording and reproducing signals. The suspension 154 may, for example, have wires (not shown) for a heater for flying height adjustment. The suspension 154 may also have, for example, wires (not shown) for a spin transfer torque oscillator or the like. These wires are electrically connected to a plurality of electrodes provided on the magnetic head.

[0171] In the magnetic recording device 150, a signal processing unit 190 is provided. The signal processing unit 190 uses the magnetic head to record and reproduce signals to and from the magnetic recording medium. The input / output lines of the signal processing unit 190 are connected to, for example, the electrode pads of the head gimbal assembly 158 and are electrically connected to the magnetic head.

[0172] The magnetic recording device 150 of the embodiment includes a magnetic recording medium, the magnetic head of the embodiment, a movable part, a position control part, and a signal processing part. The movable part can move relatively in a state where the magnetic recording medium and the magnetic head are separated or in contact. The position control part positions the magnetic head at a predetermined recording position of the magnetic recording medium. The signal processing part performs recording and reproduction of signals to and from the magnetic recording medium using the magnetic head.

[0173] For example, as the above magnetic recording medium, a recording medium disk 180 is used. The above movable part includes, for example, the head slider 159. The above position control part includes, for example, the head gimbal assembly 158.

[0174] Embodiments may include the following technical solutions.

[0175] (Technical solution 1)

[0176] A magnetic head having:

[0177] A first magnetic pole;

[0178] A second magnetic pole;

[0179] A magnetic element disposed between the first magnetic pole and the second magnetic pole and including a first magnetic layer; and

[0180] A magnetic component including a first magnetic portion, wherein a second direction from the first magnetic portion to the magnetic element intersects a first direction from the first magnetic pole to the second magnetic pole;

[0181] The first magnetic portion includes a magnetic material, and the magnetic material includes at least any one of a first material, a second material, and a third material;

[0182] The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga;

[0183] The second material includes at least one selected from the group consisting of a cubic or tetragonal compound containing Mn and Ni, a cubic alloy of Mn containing a γ phase, and a cubic alloy of Fe;

[0184] The third material includes an antiferromagnet.

[0185] (Technical solution 2)

[0186] The magnetic head according to technical solution 1,

[0187] further having a plurality of terminals;

[0188] An element current supplied through at least a part of the plurality of terminals flows through the magnetic element along the first direction;

[0189] A first magnetic portion current supplied through at least a part of the plurality of terminals flows through the first magnetic portion along the first direction.

[0190] (Technical solution 3)

[0191] The magnetic head according to technical solution 2,

[0192] The direction of the first magnetic portion current is opposite to the direction of the element current.

[0193] (Technical solution 4)

[0194] The magnetic head according to technical solution 1,

[0195] It also has: a conductive component including a first conductive portion, and a plurality of terminals;

[0196] The direction from the first conductive portion to the first magnetic portion is along the second direction;

[0197] The element current supplied through at least a part of the plurality of terminals flows through the magnetic element along the first direction;

[0198] The first magnetic portion current supplied through at least a part of the plurality of terminals flows through the first magnetic portion along the first direction;

[0199] The first conductive portion current supplied through at least a part of the plurality of terminals flows through the first conductive portion along the first direction.

[0200] (Technical solution 5)

[0201] The magnetic head according to technical solution 4,

[0202] The first magnetic portion is located between the first conductive portion and the magnetic element in the second direction.

[0203] (Technical solution 6)

[0204] The magnetic head according to technical solution 4,

[0205] The first conductive portion is located between the first magnetic portion and the magnetic element in the second direction.

[0206] (Technical solution 7)

[0207] The magnetic head according to any one of technical solutions 4 to 6,

[0208] The conductive component includes at least one selected from the group consisting of Pt, Pd, Au, W, and Ta.

[0209] (Technical solution 8)

[0210] The magnetic head according to technical solution 1,

[0211] At least one of the first magnetic pole and the second magnetic pole includes a medium facing surface;

[0212] The absolute value of the angle between the first direction and the medium facing surface is 10 degrees or less;

[0213] The second direction is along the medium facing surface.

[0214] (Technical solution 9)

[0215] The magnetic head according to technical solution 1,

[0216] At least one of the first magnetic pole and the second magnetic pole includes a medium facing surface;

[0217] The absolute value of the angle between the first direction and the medium facing surface is 10 degrees or less;

[0218] The second direction intersects the medium facing surface.

[0219] (Technical solution 10)

[0220] The magnetic head according to technical solution 3 or 4,

[0221] The magnetization direction of the first magnetic part is along a third direction intersecting the plane including the first direction and the second direction.

[0222] (Technical solution 11)

[0223] The magnetic head according to technical solution 3,

[0224] The magnetic component further includes a second magnetic part, and the second magnetic part includes the magnetic material;

[0225] The magnetic element is located between the first magnetic part and the second magnetic part in the second direction.

[0226] (Technical solution 12)

[0227] The magnetic head according to technical solution 11,

[0228] It further has a plurality of terminals;

[0229] The element current supplied through at least a part of the plurality of terminals flows through the magnetic element along the first direction;

[0230] The first magnetic part current supplied through at least a part of the plurality of terminals flows through the first magnetic part along the first direction;

[0231] The second magnetic part current supplied through at least a part of the plurality of terminals flows through the second magnetic part along the first direction.

[0232] (Technical solution 13)

[0233] The magnetic head according to technical solution 11,

[0234] It further has: a conductive component including a first conductive part and a second conductive part, and a plurality of terminals;

[0235] The magnetic element is located between the first conductive part and the second conductive part in the second direction;

[0236] The component current supplied through at least a part of the plurality of terminals flows through the magnetic element in the first direction;

[0237] The first magnetic part current supplied through at least a part of the plurality of terminals flows through the first magnetic part in the first direction;

[0238] The first conductive part current supplied through at least a part of the plurality of terminals flows through the first conductive part in the first direction;

[0239] The second magnetic part current supplied through at least a part of the plurality of terminals flows through the second magnetic part in the first direction;

[0240] The second conductive part current supplied through at least a part of the plurality of terminals flows through the second conductive part in the first direction.

[0241] (Technical solution 14)

[0242] The magnetic head according to technical solution 13,

[0243] The first magnetic part is located between the first conductive part and the magnetic element in the second direction;

[0244] The second magnetic part is located between the magnetic element and the second conductive part in the second direction.

[0245] (Technical solution 15)

[0246] The magnetic head according to technical solution 13,

[0247] The first conductive part is located between the first magnetic part and the magnetic element in the second direction;

[0248] The second conductive part is located between the magnetic element and the second magnetic part in the second direction.

[0249] (Technical solution 16)

[0250] The magnetic head according to any one of technical solutions 11 to 15,

[0251] The magnetization direction of the first magnetic part is along a third direction intersecting with the plane including the first direction and the second direction;

[0252] The magnetization direction of the second magnetic part is along the third direction and includes a component opposite to the magnetization direction of the first magnetic part.

[0253] (Technical solution 17)

[0254] The magnetic head according to any one of Technical Solutions 11 to 15

[0255] The magnetic component further includes a third magnetic portion, and the third magnetic portion includes the magnetic material;

[0256] The direction from the magnetic element to the third magnetic portion is along a third direction that intersects the plane including the first direction and the second direction.

[0257] (Technical Solution 18)

[0258] The magnetic head according to any one of Technical Solutions 1 to 17

[0259] The magnetic element further includes:

[0260] A first non-magnetic layer disposed between the first magnetic pole and the first magnetic layer; and

[0261] A second non-magnetic layer disposed between the first magnetic layer and the second magnetic pole.

[0262] (Technical Solution 19)

[0263] The magnetic head according to any one of Technical Solutions 1 to 17

[0264] The magnetic element further includes:

[0265] A second magnetic layer disposed between the first magnetic layer and the second magnetic pole;

[0266] A first non-magnetic layer disposed between the first magnetic pole and the first magnetic layer;

[0267] A second non-magnetic layer disposed between the first magnetic layer and the second magnetic layer; and

[0268] A third non-magnetic layer disposed between the second magnetic layer and the second magnetic pole.

[0269] (Technical Solution 20)

[0270] A magnetic recording device includes the magnetic head according to Technical Solution 2 and a circuit;

[0271] The circuit can supply the element current to the magnetic element and supply the first magnetic portion current to the first magnetic portion.

[0272] According to the embodiment, a magnetic head and a magnetic recording device capable of improving the recording density can be provided.

[0273] In the specification of this application, "vertical" and "parallel" are not strictly vertical and strictly parallel. For example, including deviations in the manufacturing process, etc., as long as they are substantially vertical and substantially parallel.

[0274] As described above, the embodiments of the present invention have been described with reference to specific examples. However, the present invention is not limited to these specific examples. For example, regarding the specific configurations of various elements such as the magnetic poles, magnetic elements, magnetic layers, non-magnetic layers, terminals, and wirings included in the magnetic head, as long as those skilled in the art can similarly implement the present invention by appropriately selecting from the known range and obtain the same effects, they are also included in the scope of the present invention.

[0275] A configuration formed by combining any two or more elements of the specific examples within the technically possible range, as long as it includes the gist of the present invention, is also included in the scope of the present invention.

[0276] In addition, as embodiments of the present invention, based on the above-described magnetic head and magnetic recording device, all magnetic heads and magnetic recording devices that those skilled in the art can implement by appropriately designing and changing, as long as they include the gist of the present invention, also belong to the scope of the present invention.

[0277] In addition, it should be understood that within the scope of the idea of the present invention, those skilled in the art can conceive of various modification examples and correction examples, and it should be understood that these modification examples and correction examples also belong to the scope of the present invention.

Claims

1. A magnetic head, comprising: A first magnetic pole; A second magnetic pole; A magnetic element disposed between the first magnetic pole and the second magnetic pole and including a first magnetic layer; and A magnetic member including a first magnetic portion, wherein a second direction from the first magnetic portion to the magnetic element intersects a first direction from the first magnetic pole to the second magnetic pole; The first magnetic portion includes a magnetic material, and the magnetic material includes at least any one of a first material, a second material, and a third material; The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga; The second material includes at least one selected from the group consisting of a cubic or tetragonal compound containing Mn and Ni, a cubic alloy of Mn containing a γ phase, and a cubic alloy of Fe; The third material includes an antiferromagnet; The magnetic head further includes a plurality of terminals; An element current supplied through at least a part of the plurality of terminals flows through the magnetic element along the first direction; A first magnetic portion current supplied through at least a part of the plurality of terminals flows through the first magnetic portion along the first direction.

2. A magnetic head, comprising: A first magnetic pole; A second magnetic pole; A magnetic element disposed between the first magnetic pole and the second magnetic pole and including a first magnetic layer; and A magnetic member including a first magnetic portion, wherein a second direction from the first magnetic portion to the magnetic element intersects a first direction from the first magnetic pole to the second magnetic pole; The first magnetic portion includes a magnetic material, and the magnetic material includes at least any one of a first material, a second material, and a third material; The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga; The second material includes at least one selected from the group consisting of a cubic or tetragonal compound containing Mn and Ni, a cubic alloy of Mn containing a γ phase, and a cubic alloy of Fe; The third material includes an antiferromagnet; The magnetic head further includes: a conductive member including a first conductive portion, and a plurality of terminals; A direction from the first conductive portion to the first magnetic portion is along the second direction; An element current supplied through at least a part of the plurality of terminals flows through the magnetic element along the first direction; A first magnetic portion current supplied through at least a part of the plurality of terminals flows through the first magnetic portion along the first direction; A first conductive portion current supplied through at least a part of the plurality of terminals flows through the first conductive portion along the first direction.

3. The magnetic head according to claim 2, The magnetic member further includes a second magnetic portion, and the second magnetic portion includes the magnetic material; The magnetic element is located between the first magnetic portion and the second magnetic portion in the second direction.

4. The magnetic head according to claim 3, Further includes: a conductive member including a first conductive portion and a second conductive portion, and a plurality of terminals; The magnetic element is located between the first conductive portion and the second conductive portion in the second direction; The component current supplied through at least a part of the plurality of terminals flows through the magnetic element along the first direction; The first magnetic part current supplied through at least a part of the plurality of terminals flows through the first magnetic part along the first direction; The first conductive part current supplied through at least a part of the plurality of terminals flows through the first conductive part along the first direction; The second magnetic part current supplied through at least a part of the plurality of terminals flows through the second magnetic part along the first direction; The second conductive part current supplied through at least a part of the plurality of terminals flows through the second conductive part along the first direction.

5. The magnetic head according to claim 3, The magnetic component further includes a third magnetic part, and the third magnetic part includes the magnetic material; The direction from the magnetic element to the third magnetic part is along a third direction intersecting with the plane including the first direction and the second direction.

6. The magnetic head according to claim 2, The conductive component includes at least one selected from the group consisting of Pt, Pd, Au, W, and Ta.

7. A magnetic head having: A first magnetic pole; A second magnetic pole; A magnetic element disposed between the first magnetic pole and the second magnetic pole and including a first magnetic layer; and A magnetic component including a first magnetic part, wherein a second direction from the first magnetic part to the magnetic element intersects a first direction from the first magnetic pole to the second magnetic pole; The first magnetic part includes a magnetic material, and the magnetic material includes at least any one of a first material, a second material, and a third material; The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga; The second material includes at least one selected from the group consisting of a cubic or tetragonal compound containing Mn and Ni, a cubic alloy containing γ-phase Mn, and a cubic alloy containing Fe; The third material includes an antiferromagnet; At least any one of the first magnetic pole and the second magnetic pole includes a medium facing surface; The absolute value of the angle between the first direction and the medium facing surface is 10 degrees or less; The second direction is along the medium facing surface.

8. A magnetic head having: A first magnetic pole; A second magnetic pole; A magnetic element disposed between the first magnetic pole and the second magnetic pole and including a first magnetic layer; and A magnetic component including a first magnetic part, wherein a second direction from the first magnetic part to the magnetic element intersects a first direction from the first magnetic pole to the second magnetic pole; The first magnetic part includes a magnetic material, and the magnetic material includes at least any one of a first material, a second material, and a third material; The first material includes at least one selected from the group consisting of Mn3Sn, Mn3Ge, and Mn3Ga; The second material includes at least one selected from the group consisting of a cubic or tetragonal compound containing Mn and Ni, a cubic alloy containing γ-phase Mn, and a cubic alloy containing Fe; The third material includes an antiferromagnet, At least one of the first magnetic pole and the second magnetic pole includes a medium facing surface; The absolute value of the angle between the first direction and the medium facing surface is 10 degrees or less; The second direction intersects the medium facing surface.

9. A magnetic recording device having the magnetic head according to claim 1 and a circuit; The circuit can supply the element current to the magnetic element and can supply the first magnetic portion current to the first magnetic portion.

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